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beam diameter |
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beam diameter [′bēm dī‚am·əd·ər] (optics) The distance between points on opposite sides of a light beam at which the power per unit area drops to 1/e(0.37) times its maximum value. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| Since the velocity signature of a circulation would be detected between two adjacent radar azimuths, depending on where the circulation happens to fall relative to the radar beams, this will lead to uncertainty on the location of the circulation of up to one-half of the beam diameter based solely on this sampling. When the beam is defocused and a beam diameter of 2 mm occurs, soft tissue is vaporized, whereas in the focused mode, with a 0. At the NG-6 end station, the highly collimated cold neutron beam exits the guide through a thin Mg window and travels through 79 cm of air to an aperture that defines the beam diameter. |
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